1211256 has 24 divisors (see below), whose sum is σ = 3280680. Its totient is φ = 403728.

The previous prime is 1211227. The next prime is 1211261. The reversal of 1211256 is 6521121.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8340 + ... + 8483.

It is an arithmetic number, because the mean of its divisors is an integer number (136695).

2^1211256 is an apocalyptic number.

It is an amenable number.

1211256 is an abundant number, since it is smaller than the sum of its proper divisors (2069424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211256 is a wasteful number, since it uses less digits than its factorization.

1211256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16835 (or 16828 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1211256 is about 1100.5707610145. The cubic root of 1211256 is about 106.5970813511.

Adding to 1211256 its reverse (6521121), we get a palindrome (7732377).

The spelling of 1211256 in words is "one million, two hundred eleven thousand, two hundred fifty-six".